The full answer
Yes — false negatives happen
A celiac blood test can come back negative even when celiac disease is present, most commonly because the person had already reduced or eliminated gluten before testing, or because of an underlying IgA deficiency that isn’t accounted for. Rarely, some people simply don’t produce a strong antibody response despite having the condition.
What to do if celiac disease is still suspected
If symptoms strongly suggest celiac disease despite a negative blood test, a doctor may still recommend endoscopy and biopsy, additional antibody tests, or genetic testing to help clarify the picture rather than ruling it out on one test alone.
Important context
Individual symptoms, reactions, medical histories, food products, and local labeling rules can vary. Community experiences are not medical evidence.
For personal medical decisions, diagnosis, testing, or treatment, consult a qualified healthcare professional.